r0 = memfd_create(&(0x7f0000000340)='\x00', 0x0)
ftruncate(r0, 0x1)
preadv(r0, &(0x7f0000000400)=[{&(0x7f0000000080)=""/200, 0x20000148}], 0x1, 0x0, 0x0)